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JOHN C. SMITH, OF- JERSEY SHORE, PENNsYLvAN IA.

WRENCH.

Specification of Letters Patent.

Application filed March 9, 1921. Serial 110,450,820.

To all whom it may concern: we I Be it known that 1, JOHN C. SMIrH,a citizen of the United States, residing at Jersey Shore, in the county of Lycoming and State of. Pennsylvania, have invented certain new and useful Improvements in lVrenehes, of which the following is a speclfication, reference being had to the accompanying drawings.

This invention relates to improvements in wrenches and more particularly to a quick adjustable monkey wrench.

An important object of the invention is to provide a device of this character which may be readily shifted to adjusted positions and in which the movable jaw may be locked in position either for 'movement or against movement, as maybe desired. 1

further objectof the invention is to provide a wrench of this character embodying the usual shank and fixed jaw and having a yoke slida-bly mounted upon the shank and held against transverse movement with relation thereto, the yoke coacting with a wedge-shaped-movable jaw to clamp the same to the shank. 1

A further object of the invention is to provide a device of the above mentioned character in which the movable jaw may be locked inv the yoke either in engagement with the shank or in spaced relation thereto.

Other objects and advantages, of the invention will become apparent throughout the following description.

In the accompanylngdrawings wherein for the purpose of illustration is shown a, preferred embodimentof my invention, and -wherem like reference characters designate like parts throughout, I

Figure ,1 is a side elevation of a wrench constructed in accordance with my invention showing the yoke'and movable jaw in the position in which they are locked against movement with relation to the shank of the wrench;

Fig. 2 is similar view showing the yoke shifted to permit of movement of the movable jaw and yoke upon the shank;

Fig. 8 is a section on the line 33 of Fig.

1, and

Fig. 4: is a sectional view partially in elevation taken through the yoke and movable jaw removed. 7

Referring now more particularly to the drawings, the numeral 10 indicates a shank provided at one end with the usual handle member 11, and at the other end with a fixed jaw 12 of the type usually employed in monkey wrenches. The shank 10 is provided in the side faces thereof with grooves 13,,and an edge face of the shank, more parratentea Aug. 9,1921.

tic'ularly that edge face underlying the j aw 12, is corrugated as indicated at 14.

The numeral 15 indicates a movable jaw I which is wedge-shaped, being tapered longitudinally.- In the side faces of the movable jaw 15, grooves 16 are provided and the inner edge of the movable jaw, or that edge eoacting with the corrugated edge of the shank 10, is corrugated as indicated at, 17.

The grooves of themovable jaw 15 are parallel to the. inclined-tapered face thereof.

,held stationaryand the yoke 18 is shifted upon the shank 10,-: the movable j aw will be moved toward or away from the shank dc pendent upon the direction of movement of the yoke, themovement being toward the shank when the yoke is moved toward the first jaw 12, and being away from the shank when the die 11 v Then the yoke is moved toward the jaw 12 sufiiciently to cause the corrugated face 17 of the movable jaw to firmly engage the yoke ismoved toward, the hancorrugated face 14 of the shank 10, it willi be obvious that the movable jaw and yoke are both held against further movement. In

order'to prevent accidental slipping of the form upon the outer faceof the yoke, spaced ears 21 to which a lever 22 is pivoted inter-.

mediateits ends. This lever has at one end a down-turned portion 23 extending through an opening 24 formed in the yoke and engaging in a notch 25 formed in the movable jaw 15, when the'yokeand jaw are in the position above described. A spring disposed beneath the other end of the lever 22, as at 26, normally forces the end 23 inwardly for '100 yoke upon the shank and movable, jaw, I

this engagement. When it is desired to gagement with the shank. At this time the tongue or end 23 of the lever 22 is alined with a second notch 27 formed in the movable jaw and will engage therewith so as to prevent relative shifting of the yoke and movable jaw, so that the yoke and jaw may be adjusted to any desired position. When the desired adjustment has been made the 'wrench may be locked as above described.

From the foregoing it is believed to be obvious that l have constructed a wrench which is particularly well adapted for the use for which it is intended by reason of the fact that it provides for a very quick adjustment of the movable jaw, and by reason of the fact that the wrench may readily be locked in adjusted position, and it will furthermore be obvious that the construc tion of the same as hereinbefore set forth is capable of some modification without departing from the spirit of my invention. 1

accordingly do not limit myself to specific structure hereinbefore set forth except as hereinafter claimed. I

,rat I claim is:

1. In wrench, a shank embodying a fixed jaw, a yoke slidably mounted on the shank and held against transverse shifting with relation thereto, movable aw longitudinally shiftably mounted in the yoke, and a connection between the yoke and movable jaw whereby said movable jaw is shifter transversely upon relative shifting movement of the yoke and movable j aw.

2.111 a wrench, a shank embodying a fixed jaw, yoke slidably mounted on the shank and held against transverse shifting with relation thereto, a movable aw longitudinally shiftably mounted in the yoke, said shank and movable aw being provided with coactingroughened faces, and a con- 7 nection between the yoke and movable jaw whereby said movable jaw is shifted transversely upon relative shifting movement of the yoke and movable aw to move the gagement with the roughened face of said shank.

In a wrench, a shank embodying a fixed jaw, a yoke slidably mounted on the shank and held against transverse shifting with relation thereto, a movable jaw longitudinally shiftably mounted in the yoke, said shank and movable jaw being provided with coactingroughened faces, a connection between the. yoke and movable aw whereby said movable jaw is shifted transversely upon relative shiftingmovement of the yoke and movable jaw to movethe roughened face thereof into or out of engagement with the roughened face of said shank, and means for locking said yoke and shiftable jaw against relative shifting movement.

in a wrench, a shank embodying a fixed aw provided in the side faces thereof with longitudinally extending grooves, a yoke slidably mounted upon the shank and embodying portions engaging in said grooves and holding said yoke against transverse shi ting upon the shank, a tapered movable jaw longitudinallyshiftably mounted in the yoke and provided in the side faces thereof with grooves paralleling its tapered face,

yoke likewise embodying portions exending into the rooves of said movable jaw, aid shank and movable jaw being provided vith reacting corrugated faces.

5. In a wrench, a shank embodying a fixed jaw provided in the side faces thereof with longitudinally extending grooves, a yoke slidablymounted upon the shank and embodying. portions engaging in said grooves and holding said yoke against transverse shifting upon the shank, a tapered movable jaw longitudinally shiftably mounted in the yoke and provided in the side faces thereof with grooves paralleling its tapered faee, said yoke likewise embodying portions extending into the grooves of said movable jaw, said shank and movable jaw being provided with coacting corrugated faces, and means for locking said yoke and shiftable jaw against relative shifting movement.

In testimony whereof I hereunto affix my signature.

JOHN C. SMITHv 

